


TODA HIROYUKI | Last modified date:2023.11.22 |

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Homepage
https://kyushu-u.elsevierpure.com/en/persons/hiroyuki-toda
Reseacher Profiling Tool Kyushu University Pure
http://www.mech.kyushu-u.ac.jp/~material/index.html
Structural Materials research Lab. .
Phone
092-802-3246
Fax
092-802-0001
Academic Degree
Doctor of Engineering
Country of degree conferring institution (Overseas)
No
Field of Specialization
Strength of Materials, Mechanical Properties of Materials
Total Priod of education and research career in the foreign country
01years00months
Outline Activities
I have lead a research group exploring materials strength and characterisation in 3D/4D. My research is in the field of deformation, fracture and fatigue on a wide range of structural/functional materials. A major focus is the exploration of the microstructure and the microstructure-property relations of such materials utilizing synchrotron X-ray microtomography at the third generation facilities, in particular the development of advanced 3D/4D measurements of stress/strain, crack-driving forces, chemical composition and crystallographic information in high density together with their applications to various issues in materials and mechanical engineerings. Recently we have proposed a new concept entitled "Reverse 4D Materials Engineering", in which the complex morphologies of existing materials is taken into account to realize a paradigm shift in materials development for structural/functional materials. We are also in charge of the development of new innovative aerospace materials that is based on a real fracture behavior that has been achiebved by applying the above-mentioned techniques.
Research
Research Interests
Membership in Academic Society
- 3D / 4D multi-scale / multi-modal materials science developed by ultra high resolution X-ray microscope
keyword : Synchrotron radiation, Microtomography, Mechanical properties, Structural materials, Imaging CT, X-ray microscopy
2021.04~2024.03. - Half-spontaneous interfacial debonding: Tomography bridging nano and macro scales
keyword : Synchrotron radiation, Micro・nanotomography, Hydrogen embrittlement, Aluminum, First principles somulation, Hydrogen partitioning
2019.10~2025.03. - 3D / 4D mesoscale materials science developed by ultrahigh magnification X-ray microscope
keyword : Synchrotron radiation, Microtomography, Mechanical properties, Structural materials, Imaging CT, X-ray microscopy
2017.04~2020.03. - Science of fatigue and fracture: Three-dimensional analyses of crack-tip using synchrotron radiation
keyword : Synchrotron radiation, Microtomography, fatigue fracture, Tracking, Strain, Crack driving force, Mapping, Titanium alloys
2014.08~2019.03. - Optimisation of microstructures in aluminium alloys via hydrogen partitioning control
keyword : Synchrotron radiation, Microtomography, Mechanical properties, Hydrogen trapping, Hydrogen embrittlement, Pore, Tracking, Strain, Mapping, Aluminum alloys
2014.09~2020.03. - Image-based analyses in 3D/4D and their application to structural materials
keyword : Synchrotron radiation, Microtomography, Mechanical properties, Structural materials, Tracking, Strain, Chemical concentration, Crack driving force, Mapping, Steels, Aluminum alloys
2001.09. - Development of new innovative aerospace materials
keyword : Synchrotron radiation, Microtomography, Mechanical properties, Structural materials, Hydrogen, Pore, 3D/4D analyses
2012.04. - A New Concept Breakthrough in Materials Development: Reverse 4D Materials Engineering
keyword : Synchrotron radiation, Microtomography, Mechanical properties, Structural materials, Optimization, Coarsening, Image-based simulation
2012.04~2017.03. - Crystallographic deformation behaviors of polycrystalline materials
keyword : Synchrotron radiation, Microtomography, X-ray difffraction, Polycrystalline materials, Crystallographic orientation, Deformation, Fracture, Damage, Structural materials
2008.04.
Books
Papers
Presentations
1. | H. Toda, M. Yamaguchi, T. Tsuru, K. Shimizu, H. Fujihara, K. Hirayama, K. Ebihara, K. Matsuda, Hydrogen embrittlement in Al-Zn-Mg alloys: Semi-spontaneous interfacial decohesion of precipitates, ICAA18(The 18th International Conference on Aluminium Alloys), 2022.09. |
2. | H. Toda, M. Yamaguchi, T. Tsuru, K. Shimizu, K. Hirayama, K. Ebihara, K. Matsuda, Hydrogen embrittlement mechanism of Al-Zn-Mg alloys: semi-spontaneous interfacial decohesion, MRM2021 (Materials Research Meeting 2021), 2021.12, [URL]. |
3. | H. Toda, K. Hirayama, K. Shimizu, K. Uesugi, A. Tkauchi, Application of high-resolution X-ray tomography to hydrogen embrittlement in aluminium, ICAA17 (The 17th International Conference on Aluminium Alloys), 2020.10. |
4. | H. Toda, K, Hirayama, H. Su, K. Shimizu, O. Takakuwa, A. Takeuchi, K. Uesugi, Recent progress in high resolution X-ray tomography at high X-ray energies, PRICM 10(The 10th Pacific Rim International Conference on Advanced Materials and Processing), 2019.08. |
5. | H. Toda, H. Su, K. Shimizu, H. Fujihara, K. Hirayama, A. Takeuchi, K. Uesugi, Assessment of hydrogen embrittlement via in-situ imaging techniques in high Zn Al-Zn-Mg alloys, ECF22(22nd European Conference on Fracture), 2018.08. |
6. | H. Toda, K. Hirayama, K. Shimizu, K. Uesugi, Application of high-resolution X-ray tomography to hydrogen embrittlement in aluminium, THERMEC'2018, 2018.07. |
7. | H. Toda, K. Shimizu, H. Gao, K. Hirayama, 4D hydrogen embrittlement behaviour in high strength aluminium alloy, TMS 2018 Annual Meeting & Exhibition, 2018.03. |
8. | H. Toda, K. Hirayama, M. Kobayashi, A. Takeuchi, K. Uesugi, Assessment of damage behavior of aluminum using diffraction-amalgamated grain boundary tracking technique, 2017 MRS Fall meeting, 2017.01. |
9. | H. Toda, M. Kobayashi , K. Hirayama, Application of diffraction-amalgamated grain-boundary tracking to deforming aluminium polycrystals, THERMEC 2016, 2016.05. |
10. | H. Toda, Origin of ductile fracture in aluminium alloys, IUTAM Symposium on Plastic localization and ductile failure, 2015.03. |
11. | H. Toda, M. Kobayashi, R. Batres, K. Shimizu, O. Kuwazuru, A new concept breakthrough in materials development: reverse 4D materials engineering, Proceedings of the 5th International Symposium on Designing, Processing and Properties of Advanced Engineering Materials, 2012.11, シンクロトロン放射光を用い て得た膨大な4D画像を『粗視化』し、簡単な幾何学パラメーターで現象を説明すること、およ び得られた4D画像を用いて行うイメージベースシミュレーションによるミクロ組織最適化の 二つを組み合わせ、「リバース4D材料エンジ ニアリング」なる材料開発プロセスの構想を得た。この基調講演では、その内容に関して講演した。この手法を用いれば、従来の「設計→試作 →製品」とは逆の、「設計←評価・解析←製品」という流れ(『リバース』というゆえん)により、「試作⇔評価」といった時間とコストのか かるプロセスを経ずに、高能率、短時間、高精度で構造材料設計が可能になる。. |
12. | H. Toda, D. J. LeClere, T. Kamiko, Y. Suzuki, A. Takeuchi, K. Uesugi, M. Kobayashi, Development of diffraction-amalgamated grain-boundary tracking technique and its application to polycrystalline metals, Proceedings of SPIE, 2012.08, 我々は、シンクロトロン放射光を用いて得た3D/4D画像の内部に多数のミクロ構造が見えることを利用し、各画像間でミクロ組織特徴点(粒子など)を高精度に追跡する技術(ミクロ組織追跡法)を発案して開発した。その後、これを応用し、結晶粒の3D/4D観察を行うことができる結晶粒界追跡法、さらにこれに結晶方位マッピングを加えたX線回折援用結晶粒界追跡法を相次いで提案し、実現している。機械材料の変形・破壊の評価では、SEM-EBSP(電子線後方散乱回折)法や各種TEM(透過型電子顕微鏡)観察が多用される。発表手法は、これら2D(二次元)情報を3D/4Dに拡張できる、唯一かつオリジナルな技法である。. |
- The Japan Institute of Light Metals
- Japan Foundry Engineering Society
- The Iron and Steel Institute of Japan
- The Japan Institute of Metals and Materials
- The Japan Society of Mechanical Engineers
- The Society of Materials Science
- JSPS 147th Committee
- JSPS 176th Committee
- SPring-8 users community
- SPring-8 X-ray Micro/Nano-tomography Research Group
Educational
Educational Activities
I am teaching three courses on "Strength of Materials" in the bachelor course, which cover basic theories of strength of materials. I am also in charge of student experiments (mechanical testing). In the graduate school, I am teaching a course entitled "Evaluation of structural materials", "Strength of automobiles" and Introduction to automotive science". I also supervise several graduate students, several bachelor students and some pos-docs in the laboratory.


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